Title :
Exact BER performance of asynchronous DS-CDMA systems using quadriphase spreading and QPSK modulation over rayleigh channels
Author :
Liu, Xiang ; Hanzo, Lajos
Author_Institution :
Sch. of Electron. & Comput. Sci., Southampton Univ.
Abstract :
An accurate closed-form expression is derived for calculating the average BER in an asynchronous DS-CDMA system using random complex-valued spreading sequences for transmission over Rayleigh channels. This accurate solution is based on the characteristic function (CF) approach and only requires a single numerical integration. Our numerical simulation results verify its accuracy, and also demonstrate the relative inaccuracy of the Gaussian approximation
Keywords :
Rayleigh channels; approximation theory; code division multiple access; error statistics; integration; quadrature phase shift keying; spread spectrum communication; BER performance; Gaussian approximation; QPSK modulation; Rayleigh channels; asynchronous DS-CDMA systems; characteristic function; numerical integration; quadriphase spreading; random complex-valued spreading sequences; Bit error rate; Closed-form solution; Computer science; Frequency division multiaccess; Gaussian approximation; Multiaccess communication; Numerical simulation; Performance analysis; Quadrature phase shift keying; Rayleigh channels;
Conference_Titel :
Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
1-4244-0269-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2006.1683628
